Altera Stratix V GX FPGA Development Board - Manual (Page 33)

Chapter 2: Board Components 2–25
Clock Circuitry
October 2014 Altera Corporation Stratix V GX FPGA Development Board
Reference Manual
Off-Board Clock Input/Output
The development board has input and output clocks which can be driven onto the
board. The output clocks can be programmed to different levels and I/O standards
according to the FPGA device’s specification.
Table 2–23 lists the clock inputs for the development board.
Table 2–24 lists the clock outputs for the development board.
Table 2–23. Off-Board Clock Inputs
Source
Schematic Signal
Name
I/O Standard
Stratix V GX
FPGA Device
Pin Number
Description
SMA
CLKIN_SMA_P LVPECL —
Input to LVDS fan-out buffer (drives one REFCLK)
CLKIN_SMA_N LVPECL —
Samtec HSMC HSMA_CLK_IN0 2.5-V AG28
Single-ended input from the installed HSMC cable
or board.
Samtec HSMC
HSMA_CLK_IN_P1 LVDS/2.5-V AR8
LVDS input from the installed HSMC cable or
board. Can also support 2x LVTTL inputs.
HSMA_CLK_IN_N1 LVDS/LVTTL AT8
Samtec HSMC
HSMA_CLK_IN_P2 LVDS/LVTTL G7 LVDS input from the installed HSMC cable or
board. Can also support 2x LVTTL inputs.
HSMA_CLK_IN_N2 LVDS/LVTTL G6
Samtec HSMC HSMB_CLK_IN0 2.5-V AF29
Single-ended input from the installed HSMC cable
or board.
Samtec HSMC
HSMB_CLK_IN_P1 LVDS/LVTTL U15 LVDS input from the installed HSMC cable or
board. Can also support 2x LVTTL inputs.
HSMB_CLK_IN_N1 LVDS/LVTTL T16
Samtec HSMC
HSMB_CLK_IN_P2 LVDS/LVTTL P16 LVDS input from the installed HSMC cable or
board. Can also support 2x LVTTL inputs.
HSMB_CLK_IN_N2 LVDS/LVTTL N16
PCI Express
Edge PCIE_REFCLK_P LVDS/LVTTL AF34
LVDS input from the PCI Express edge connector.
PCIE_REFCLK_N HCSL AF35
Table 2–24. Off-Board Clock Outputs
Source
Schematic Signal
Name
I/O Standard
Stratix V GX
FPGA Device
Pin Number
Description
Samtec HSMC HSMA_CLK_OUT0 2.5V CMOS AJ10 FPGA CMOS output (or GPIO)
Samtec HSMC
HSMA_CLK_OUT_P1 LVDS/2.5V CMOS AG9 LVDS output. Can also support 2x CMOS
outputs.
HSMA_CLK_OUT_N1 LVDS/2.5V CMOS AH9
Samtec HSMC
HSMA_CLK_OUT_P2 LVDS/2.5V CMOS G9 LVDS output. Can also support 2x CMOS
outputs.
HSMA_CLK_OUT_N2 LVDS/2.5V CMOS G8
Samtec HSMC HSMB_CLK_OUT0 2.5V CMOS L16 FPGA CMOS output (or GPIO)
Samtec HSMC
HSMB_CLK_OUT_P1 LVDS/2.5V CMOS D16 LVDS output. Can also support 2x CMOS
outputs.
HSMB_CLK_OUT_N1 LVDS/2.5V CMOS C16
Samtec HSMC
HSMB_CLK_OUT_P2 LVDS/2.5V CMOS B16
LVDS output. Can also support 2x CMOS
outputs.
HSMB_CLK_OUT_N2 LVDS/2.5V CMOS A16